minor changes

src/lib.rs

@@ -119,7 +119,7 @@ impl Options {
         self
     }
 
-    pub fn with_ipv6(mut self) -> Self {
+    pub fn with_ipv6_enabled(mut self) -> Self {
         self.ipv6_enabled = true;
         self
     }

src/main.rs

@@ -92,7 +92,7 @@ fn main() -> ExitCode {
     }
 
     if args.ipv6_enabled {
-        options = options.with_ipv6();
+        options = options.with_ipv6_enabled();
     }
 
     let interface = match args.tun_fd {